FCB415RJ Equivalent & Substitute Parts

Part Overview

The FCB415RJ is a 15 Ohm, 4W radial wirewound resistor manufactured by TE Connectivity Passive Product. This through-hole component features flame retardant coating and safety-rated construction, designed for applications requiring robust thermal performance and electrical reliability. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing procurement and design continuity.

Substiute Parts

FCB415RJ

TE Connectivity Passive ProductIn Stock: 755FCB415RJ Datasheet

Current PartRFQ

FCB415RJ

TE Connectivity Passive ProductIn Stock: 755FCB415RJ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FCB415RJ is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 15 Ohms
• Tolerance: ±5%
• Power dissipation capability: 4W minimum
• Temperature coefficient: -80/+40 ppm/°C or better

Mechanical Parameters:

• Package configuration: Radial through-hole
• Physical dimensions: 0.197" Dia × 0.953" L (5.00mm × 24.20mm)
• Termination count: 2 leads

Construction & Compliance:

• Composition: Wirewound
• Flame retardant coating and safety features required
• Operating temperature range: -55°C to 200°C minimum
• RoHS3 compliance mandatory

Substitute parts must satisfy all parameters simultaneously. No parameter relaxation or trade-off is permitted for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The FCB415RJ is identified as an obsolete component. Replacement selection must prioritize parts maintaining identical electrical and mechanical specifications to ensure direct board-level compatibility without circuit redesign or PCB layout modification.

Substitute components must demonstrate:

• Equivalent resistance value and tolerance band for circuit performance preservation
• Identical power dissipation rating to maintain thermal design margins
• Matching physical envelope and radial lead configuration for through-hole PCB mounting
• Flame retardant coating and safety construction features for compliance with original design intent
• ROHS3 compliance status for regulatory alignment
• Operating temperature range spanning -55°C to 200°C for environmental specification satisfaction

Selection of alternatives with relaxed specifications, different package types, or reduced safety features introduces design risk and is not recommended for direct substitution applications.

Frequently Asked Questions (FAQ)

Q: Can the FCB415RJ be replaced with a different resistance value?

A: No. The 15 Ohm resistance value is a critical circuit parameter. Substitution requires exact resistance matching at ±5% tolerance. Alternative resistance values constitute a circuit design change, not a component substitution.

Q: Are axial wirewound resistors acceptable substitutes for the radial FCB415RJ?

A: No. The FCB415RJ specifies radial package configuration. Axial packages have different lead geometry and PCB footprints, requiring board redesign. Package type is a non-negotiable substitution criterion.

Q: What if a substitute part has a lower power rating, such as 2W instead of 4W?

A: Lower power ratings are not acceptable. The 4W rating establishes thermal design margins for the application. Reduced power ratings increase junction temperature and reduce component reliability. Power rating must equal or exceed 4W.

Q: Is RoHS3 compliance required for substitute selection?

A: Yes. The FCB415RJ is RoHS3 compliant. Substitute parts must maintain equivalent compliance status to satisfy regulatory and procurement requirements.

Q: Can the operating temperature range be narrower than -55°C to 200°C?

A: No. The specified temperature range defines the application environment. Substitute parts must support the full -55°C to 200°C operating window to ensure functional reliability across all operating conditions.

Q: Does the flame retardant coating affect electrical performance?

A: The flame retardant coating and safety features are integral to the FCB415RJ design specification. These features must be present in substitute components to maintain compliance with original design requirements and safety standards.

Q: What is the significance of the temperature coefficient specification?

A: The -80/+40 ppm/°C temperature coefficient defines resistance stability across the operating temperature range. Substitute parts must match this specification to maintain circuit performance consistency and predictability.

Q: Are there any dimensional tolerance considerations for the 0.197" Dia × 0.953" L package?

A: The specified dimensions establish the physical envelope for PCB mounting and thermal management. Substitute parts must conform to these dimensions to ensure mechanical fit and thermal performance equivalence.